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2 years ago

In a lab experiment, 1900 bacteria are placed in a petri dish. The conditions are such

Mathematics

1 answer:

GREYUIT [131]2 years ago

3 0

Answer:

393 bacteria

Step-by-step explanation:

First find how much it would increase per hours :

1900 / 29 = 65.5172414

Then take this and multiply it by 6 to get :

393.103448

Round it to the nearest whole number to get:

393 bacteria

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A round cake has a diameter of 30\text{ cm}30 cm30, start text, space, c, m, end text. Angela places the cake on a circular cake

VLD [36.1K]

Answer:

The circumference of the cake board is <u>35π cm</u>.

Step-by-step explanation:

The question is incomplete, so the complete question is below:

A round cake has a diameter of 30 cm. Angela places the cake on a circular cake board with a diameter 5 cm longer than that of the cake. What is the circumference of the cake board? Give your answer in terms of π.

Now, to find the circumference of the cake board.

As, given diameter of cake = 30 cm.

And diameter of cake board is 5 cm longer than that of the cake.

Thus, the diameter of cake board is:

$30\ cm+5\ cm=35\ cm.$

So, to find the circumference we need radius, by putting formula:

$Radius(r)=\frac{Diameter}{2}$

$Radius(r)=\frac{35}{2}$

$Radius(r)=17.5\ cm.$

Now, to get the circumference of the cake board we put formula:

$Circumference=2\pi r.$

$Circumference=2\times \pi \times 17.5$

$Circumference=35\pi \ cm.$

Therefore, the circumference of the cake board is 35π cm.

4 0

2 years ago

1. Simplify the problem below -3x^-2

frozen [14]

Answer: -3/x^2

Step-by-step explanation:

Hope this helps

4 0

3 years ago

Read 2 more answers

What equation passes through (0,5) and (-4,-1)

kogti [31]

Answer: y = 3/2x + 5

Step-by-step explanation:

Find the slope/gradient:

$\frac{-1-5}{-4-0} = \frac{-6}{-4} = \frac{3}{2}$

Plug in a point to the equation:

$5 = \frac{3}{2}(0) + b$

Solve for b:

$5 = b$

New equation:

$y = \frac{3}{2}x + 5$

7 0

3 years ago

How do I determine that answer step by step?

Nuetrik [128]

Answer:

just write the expression

Step-by-step explanation:

if its for math but then i dont know

7 0

2 years ago

Triangle- interior angle<br> Please help !

sp2606 [1]

Answer:

x = 25

<B = 120 degrees

<C = 30 degrees

Step-by-step explanation:

Total angle measure of a triangle - 180 degrees

Add all the angles together to find the value of x

30 + 4x + 20 + x + 5 = 180

55 + 5x = 180

55 - 55 + 5x = 180 - 55

5x = 125

$\frac{5x}{5} = \frac{125}{5}$

x = 25

<B = 4(25) + 20

<B = 100 + 20

<B = 120

<C = 25 + 5

<C = 30

7 0

3 years ago